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Consequences of Cd or Zn accumulation on element redistribution within leaves of Zygophyllum fabago and related impact on plant physiology

Lefèvre, Isabelle S.;Vogel-Mikǔs, Katarina;Jeromel, Luka;van Elteren, Johannes;Lutts, Stanley;et.al.
(2012) 9th International Phytotechnology Society Conference — Location: Hasselt University, Belgium (11.September.2012)

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Authors
  • Lefèvre, Isabelle S.UCLouvain
    Author
  • Vogel-Mikǔs, KatarinaUniversity of Ljubljana
    Author
  • Jeromel, LukaJozef Stefan Institute
    Author
  • van Elteren, JohannesNational Institute of Chemistry
    Author
  • Lutts, StanleyUCLouvain
    Author
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Abstract
The aim of our research was to identify some new interesting accumulators which may associate an important biomass production with an effective absorption and translocation of heavy metals. The present study focused on the response to cadmium and zinc stress in a metallicolous population of the Syrian bean caper (Zygophyllum fabago), a succulent perennial shrub. Its goal was i) to determine the accumulation and spatial distribution of Cd and Zn in leaves of Z. fabago and the consequences of their accumulation and distribution on essential elements, ii) to determine the biochemical and resulting physiological parameters modified in relation to the distribution of essential and non-essential elements. Seedlings of Z. fabago were exposed during 4 weeks to 10 µM CdCl2 or 50 µM ZnSO4 in a controlled environment. A detailed localisation of elements within leaf tissues was determined through micro-PIXE and LA-ICP-MS and revealed a highly heterogeneous element distribution within leaf cross-section. A preferential accumulation of Zn occurred in spongy mesophyll while Cd appeared more uniformly distributed in leaf sections. Pattern of distribution of essential elements between leaf tissues were modified in response to Cd or Zn accumulation and are specific of the considered heavy metal. These results will be discussed in relation to a combined physiological (photosynthetic activity, plant water and oxidative status), metabolic (accumulation of putative osmo-protecting compounds) and proteomic approach. All together, these results give some clues about adaptation processes of Z. fabago to Cd and Zn toxicity.
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Lefèvre, I. S., Vogel-Mikǔs, K., Jeromel, L., van Elteren, J., Planchon, S., Lepoint, G., Gobert, S., Renaut, J., Pelicon, P., & Lutts, S. (2012). Consequences of Cd or Zn accumulation on element redistribution within leaves of Zygophyllum fabago and related impact on plant physiology. 9th International Phytotechnology Society Conference, Hasselt University, Belgium. https://hdl.handle.net/2078.5/160645